First, offset printing color reduction
Offset printing is also known as lithography, therefore, whether the color of offset printing can be correctly restored, has the most direct impact on the printing plate (PS plate) on the formation of patterns on the dot. As long as the density of the dot distribution of the pattern is appropriate and consistent with the needs of the designed document dot, then basically there will be no large color errors.
The main factors that affect the accuracy of the printing dot are the accuracy of the film screening, the exposure accuracy of the film printing plate, the performance contrast of the cable ladder gray level of the PS plate and other main factors. In order to ensure that the printing effect achieves the pre-press design effect, it is necessary to take into account the factors and influences such as the dot of the film design and the printing version exposure, whether it will cause the deviation of the printing color effect. Since the printing color is affected by the inking amount of the printing plate, and the inking amount is formed by the density of the dot, the dot is the key factor affecting the accurate restoration of the color. Graphic design and the performance of print design
Graphic design is the preference of many young people, graphic design is the basic work of print design, without the basis of graphic design is unable to print design, the basic principle of print graphic design is, in addition to the operation of graphic design software, graphic design pattern processing skills, We should also be familiar with the basic structure of the packaging box, the basic functional requirements of the packaging box, and the basic regulations of the state on commodity packaging. The simple graphic design is just a person's combination of materials and a list of common sense. For example, how to highlight the theme, how to set the main tone of the color, how to arrange the essential content reasonably in a limited range of structures, which form of expression is suitable for the structure of the packaging box, and so on. In addition to these basic skills, print graphic design also needs to know the basic knowledge of printing, which is the basic conditions necessary for printing. Some primary graphic designers who do not understand the basic knowledge of the printing process often appear to be beautiful, but it is difficult to show the effect when printing. For example, whether the color can be accurately restored, whether the size of the font can be clearly printed, whether the pattern structure affects the accuracy of the overprint and so on. These problems are that the printing design must take into account the principle of color reduction and performance in the printing process, it must be considered that the color of the graphic design is a complete color, and the printing must be divided into all the colors of red, yellow, blue and black these four basic monochrome, after layers of monochrome superimposed together, in order to restore the color reduction. Therefore, the pre-press graphic designers must understand how to print graphic design to their own design concepts and ideas into reality, really show, this is a qualified print graphic design.